結果
問題 | No.133 カードゲーム |
ユーザー |
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提出日時 | 2017-01-29 23:23:41 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 54 ms / 5,000 ms |
コード長 | 2,497 bytes |
コンパイル時間 | 2,291 ms |
コンパイル使用メモリ | 77,972 KB |
実行使用メモリ | 37,428 KB |
最終ジャッジ日時 | 2024-06-25 03:48:22 |
合計ジャッジ時間 | 4,154 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 19 |
ソースコード
import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.util.Arrays;import java.util.StringTokenizer;public class Main {void solve() throws IOException {int n = ni();int[] a = nia(n);int[] b = nia(n);Arrays.sort(a);double ans = 0;do {int cnt = 0;for (int i = 0; i < n; i++) {if (a[i] > b[i]) cnt++;}if (cnt > n - cnt) ans++;} while (nextPermutation(a));for (int i = 1; i <= n; i++) {ans /= i;}out.println(ans);}boolean nextPermutation(int[] a) {int n = a.length;int i = n - 1;while (i > 0 && a[i - 1] >= a[i]) i--;if (i <= 0) return false;int j = n - 1;while (a[j] <= a[i - 1]) j--;swap(a, i - 1, j);int k = n - 1;while (i < k) swap(a, i++, k--);return true;}void swap(int[] a, int i, int j) {int tmp = a[i];a[i] = a[j];a[j] = tmp;}String ns() throws IOException {while (!tok.hasMoreTokens()) {tok = new StringTokenizer(in.readLine(), " ");}return tok.nextToken();}int ni() throws IOException {return Integer.parseInt(ns());}long nl() throws IOException {return Long.parseLong(ns());}double nd() throws IOException {return Double.parseDouble(ns());}String[] nsa(int n) throws IOException {String[] res = new String[n];for (int i = 0; i < n; i++) {res[i] = ns();}return res;}int[] nia(int n) throws IOException {int[] res = new int[n];for (int i = 0; i < n; i++) {res[i] = ni();}return res;}long[] nla(int n) throws IOException {long[] res = new long[n];for (int i = 0; i < n; i++) {res[i] = nl();}return res;}static BufferedReader in;static PrintWriter out;static StringTokenizer tok;public static void main(String[] args) throws IOException {in = new BufferedReader(new InputStreamReader(System.in));out = new PrintWriter(System.out);tok = new StringTokenizer("");Main main = new Main();main.solve();out.close();}}